While this is a good way to test drive the service, the 3 free apps are only going to work for extremely lightweight apps (20mb database for example) and does not include a custom domain (this costs $5p/m). Without a custom domain it is obviously limited to non real world app deployment. It's a good marketing attempt but don't think you're going to be hosting real world apps unless you pay.
That's the brilliance of the the model which I believe was pioneered by Heroku. The ingredients are a super easy-to-use platform and a free plan with resource but no time limits. This way you attract people in when they are poor, inexperienced, have no admin skills, and no expectations for success of their app (which is a huge market). By the time they need to upgrade the platform is proven to them and it's a significant pain point if they want to move, so they willingly pay a heavy premium over what the raw resources would cost if they set them up themselves.
